Almost wondering if it would’ve better to just build an 8ft ramp out of plywood to make the angle lower when going up. But just threw out the boxes for the ramps.
I don't think so.
That trailer is hella low compared to the bed of my pickup truck and I have the exact same ramp you're using. You just need some practice clutching it up while walking beside the bike up the ramp.
If your platform is less than 24" high, two strong guys could probably deadlift your bike up right up onto that trailer without a ramp.